MPA Electrical 11178 Alternator

Remanufactured Alternator for Lucerne and DTS

MPA Electrical Part Number 11178 is a remanufactured 12-volt alternator built for charging-system service on select Buick Lucerne and Cadillac DTS applications. It delivers 150 amps with an internal regulator, internal fan, and clockwise rotation for direct-fit replacement use.

Key Features

• 150 amp output for stable charging performance
• 12 volt alternator with internal regulator
• Internal fan design for charging-system cooling
• 6 groove serpentine pulley
• Clock position: 7:00
• Manufacturer reference: Nippondenso
• Remanufactured by MPA Electrical

Product Details

This MPA Electrical remanufactured alternator, part number 11178, is built around the specifications commonly used in OE charging systems for Buick Lucerne and Cadillac DTS models. The unit features a 150 amp rating, internal regulation, and clockwise rotation, with a 6 groove serpentine pulley to match the listed application. It cross-references BBB Industries 11178 for the same application.

Compatible With 2006-2011 Buick Lucerne and 2006-2010 Cadillac DTS, this alternator is a fitment-based replacement for vehicles that require the listed Nippondenso-style configuration. For 2011 Cadillac DTS, it fits models except Limousine Prep Package with a 150 amp alternator.

Common Issues This Part May Address

• Battery warning light caused by alternator output loss
• Low charging voltage during driving or idle
• Dim lights or electrical instability from weak charging performance
• Accessory performance problems related to insufficient system voltage
• Starting issues caused by an undercharging battery

Installation Notes and Tips

Verify pulley groove count, clock position, rotation, and amperage before installation. Confirm the vehicle uses the listed 12-volt, internal-regulator alternator configuration and compare the original unit to the part number 11178 application details. On 2011 Cadillac DTS models, check for the Limousine Prep Package exclusion before ordering.

Quality Assurance

MPA Electrical remanufactured components are rebuilt to restore charging-system function using application-specific specifications. This alternator is identified by part number 11178 and is listed with OE-style interchange references for the same fitment.